Each channel is approximately 3/8" wide, and the set of 5 includes lengths of 12", 14", 16", 14", 12".

*Occasional imperfections may be present on Rubber Molds, and can be removed or altered using a sharp utility knife, or a very abrasive sand paper or resin-bound grinding discs.

Product Detail:

Rubber Drain Board insert for use with concrete countertop fabrication.

The Combine Drainboard has 5 raised round grooves in the mold, which creates 5 depressed concrete channels in the finished concrete. Channels add a visual element to the Drainboard, and are designed to assist in water draining to the sink.

Stainless Steel 3/8" round trivet bars are available (Sold Here) in a pre-cut and shaped set of 5 bars to fit this Combine Drainboard.

Clean, nice edges. Fast and simple to use. Add a professional drainboard to your countertop form in minutes.

Seamless integral drainboard, countertop, and/or sink.

Drainboard slopes toward sink.

If the drainboard needs to be shaped (to meet flush with a specific sink), simply cut the rubber mold with a sharp razor knife, or fine tooth jigsaw blade.

Made of extremely durable polyurethane that can flex and stay strong.

Can be used in pre-cast or poured in place concrete work.

Fast and easy to place in a mold, and quick to clean after use.

Good for hundreds of uses- Actually gets better with each use as they 'season'.

Mold Setup:

Place Drainboard Mold in your form and silicone in place.

For most applications (Precast), run a silicone a bead across the bottom edge of the Drainboard Mold to create a water-tight seal.

If using for poured in place concrete countertops, press the drainboard down into the concrete surface, lightly tapping until flush with the surface, and then place a board or 2x4's across the top of the concrete and Drainboard Mold to hold it in place while the concrete sets up.

Use of a Rubber Safe form release is recommended, and will create a smoother finish on the concrete, less air pockets, and make cleaning the rubber mold easier when finished.

Vibrate concrete well (either vibrating the concrete, or rapidly tapping the edges of the forms with a hammer or palm sander), to remove as many air pocket voids as possible.

Drainboard Mold Removal:

After the concrete is sufficiently set up (typically 2-3 days for precast), flip the concrete piece over and remove the Drainboard Mold. In many cases, the mold will stay siliconed to the form when separated from the concrete.

Concrete may have small 'bumps' which can be sanded off with a 200 grit sandpaper. These bumps tend to disappear the more the Rubber Drainboard Mold is used, as it becomes seasoned.

Clean with a stiff brush and water after each use. Any silicone left on the forms should be peeled or scraped off (the sooner the easier to remove). Any hardened concrete and difficult to remove silicone can usually be removed using a wire brush.

Muriatic Acid can be used to clean of cement residue from the rubber mold in a 20:1 ratio (20 parts water to 1 part muriatic acid). Rub the Drainboard Mold with a stiff nylon brush and the muriatic acid water. Rinse the mold thoroughly with clean water.

In the beginning...

Expressions LTD, founded in 2004 as a Concrete Countertop design company, and working ever since to develop and supply product for use in the concrete industry. But don't overlook some of our other cool, and a bit unusual, products such as our custom signage, doorbell pieces, and unique decor.